McDonough, Scott, 2008, "A Second Constantine?: The Sasanian King Yazdgard in Christian History and Historiography", Journal of Late Antiquity I/1, pp. 128-141.
Source: http://wpunj.academia.edu/ScottMcDonough/Papers/1006231/A_Second_Constantine_The_Sasanian_King_Yazdgard_in_Christian_History_and_Historiography